Hinge pin puller



Jan. 16, 1934. J. G. MEINERS HINGE PIN FULLER Filed Deo. e, 1932 Hfs H7-raw/5K5.

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mmm!! Patented ian. 16, 1934 UNITED STATES PATENT OFFICE HINGE PINFULLER Application December 8, 1932.

Serial N0. 646,263

1 Claim. (Cl. 29-86.1)

This invention relates to devices for forcing pin members out ofopenings in other members in which the pin members have become firmlyseated, particularly for removing hinge pins from hinges. In many cases,hinge pins become so thoroughly rusted, or bent, or otherwise tightlyseated in the hinge members that it is practically impossible to removethem by ordinary manual punching or pulling operations without bendingor breaking the hinge members. The principal objects of this inventionare a device which is capable of forcing a hinge pin out of a hingemember Without injuring the hinge member and which is readily adjustableto adapt the device to pin members and hinge members of different sizes.

Other objects are a device which is easily operated, which is simple inconstruction, and which is comparatively inexpensive to make.

The invention consists in the hinge pin puller and in the parts andcombinations and arrangements of parts hereinafter described andclaimed.

In the accompanying drawing which forms part of this specification andwherein reference numerals refer to like parts wherever they occur,

Fig. 1 is a front view of a hinge pin puller device embodying myinvention withv the device shown in position for forcing a hinge pin outof a hinge member, and

Fig. 2 is a vertical section along the line 2-2 in Fig. 1.

In the accompanying drawing is shown a hinge pin puller deviceparticularly adapted for forcing hinge pins out of automobile door hingemembers. The device is operated by hydraulic pressure; it 35 is shownclamped on an automobile door hinge member 1 in position for forcing ahinge pin 2 therefrom.

'The puller device comprises a body portion 3 having an integral jaw 4at its upper end and a larger jaw 5 at its lower end. The opening 6defined by the jaws accommodates the hinge member 1. The end of thelower jaw 5 is enlarged and bored out to form a chamber 7 adapted toconstitute a high pressure hydraulic cylinder. The lower jaw 5 also hasan integral lateral extension 8 thatis bored out to form a chamber 9adapted to constitute a primary hydraulic cylinder; and the twocylindersare connected by an opening 10.

Disposed within the high pressure cylinder is a plunger 11 comprising ahead portion 12 and a stem portion 13 that extends above the top of saidcylinder. The upper portion of the inner periphery of the cylinder isthreaded for screwing therein an exteriorly threaded sleeve member 14that has a central opening through which the stem of the plunger 11extends; and the top of said sleeve member is provided with an annularcollar portion 15 whose outer periphery is, preferably, knurled. A coilspring 16, surrounding the stem oi the plunger, is interposed betweenthe sleeve member and the head of the plunger.

The primary cylinder has a piston member 17 disposed therein that isprovided on the end of a screw member 18 extending through a threaded 55opening in an exteriorly threaded cap 19 fixed in the cuter end of thecylinder. The outer end of said screw member 18 is provided with asuitable handle 20 for rotating it. The top of the u primary cylinder isprovided with a fitting 21 70 for a pressure gun or other device (notshown) for iilling the cylinders with a hydraulic medium.

The upper jaw of the body portion of the device is provided with anenlarged end portion having an opening 22 therethrough that extends 75in alinement with the plunger in the high pressure cylinder. Fitted insaid opening 22 is a sleeve member 23 having an annular collar portion24 at its bottom whose outer periphery is, preferably, knurled. The topof said collar portion 24 abuts against the bottom of the part of theupper jaw surrounding the opening 22 therethrough.

In operating the device, it is clamped on the l hinge member 1 byresting the bottom of the 85 sleeve member 23 in the upper jaw on thetop of the hinge member l, and then rotating the sleeve member 14 thatis mounted around the stem of the plunger until the top of said sleevemember 14 engages the bottom of the hinge member 1. 90 In thisconnection, it is important to note that the top edge of the centralopening through the sleeve member 14 is beveled as at 25. For the deviceto operate properly, it must be clamped on the hinge member 1 in suchposition that the 95 plunger is in alinement with the hinge pin 2. Withautomobile door hinges, in particular, the lower end of the hinge pinusually extends a slight distance below the bottom of the hinge member.Accordingly, the beveled edge around the opening at the top of thesleeve member 14 will cooperate with the lower end of the hinge pin whenthe device is being clamped on the hinge member to cause the device tomove into correct operative position with the stem of the plunger inexact alinement with the hinge pin. After the device is clamped on thehinge member, the screw member handle 20 is operated to move the screwmember 18 inwardly which sets up a pressure in the primary cylinder thatis transmitted to the high pressure cylinder. The pressure set up in thehigh pressure cylinder forces the plunger therein upwardly and causesits stem portion to engage the hinge pin and to force it out of thehinge member. The coil spring 16 that is mounted around the stem of theplunger forces the piston downwardly againV after the hinge pin isremoved and the pressure is relieved.

The hinge pin puller device hereinabove described is readily adjustablefor removing hinge pins out of hinge members of different sizes. Ifhinge pins having comparatively large heads are to be removed, thesleeve member in the upper jaw of the device may be removed therefrom toprovide a larger opening for accommodating the large pin heads.Furthermore, the sleeve member 14 that is mounted around the stem of theplunger, besides constituting a guide for said plunger and a means forproperly alining the same, can also be screwed up and down to vary thegap between the jaws. In this connection, it is to be noted that whenthe guide bushing 14 is screwed to cause it to move inwardly of thecylinder, the coil spring and the plunger will also move inwardly withthe sleeve when the pressure is relieved.

The device can also be conveniently handled; it is comparatively easy tooperate. The device is readily clamped on to the work in correctoperative position before applying the pressure to force out the hingepin. It is not necessary, therefore, to hold the device in position atthe same time that it is manipulated to apply the pressure. The deviceis simple in construction, and by reason of its novel shape, isparticularly adapted for removing hinge pins from automobile doorhinges. The operating handle of the device is carried out atright-angles to the body of the device in a convenient place away fromthe fenders and the body of the automobile.

Obviously, the construction hereinabove described admits of considerablevariations without departing from the spirit of the invention. Forinstance, it may be feasible to use a separate pressure gun, or thelike, which may be removably attached to the lower end of the highpressure cylinder instead of making the primary cylinder as an integralpart of the body of the device. As other changes may be desirable, I donot wish to be limited to the precise construction and arrangement ofparts shown and described.

What I claim is:

A hinge pin puller comprising a hand grip portion having jaws at itsends, one of said jaws having an opening extending therethrough, a hingepin receiving sleeve removably mounted in said opening and provided atits hinge engaging end with a stop collar adapted =to abut against theadjacent face of said jaw, the other of said jaws being provided with ahigh pressure cylinder, a sleeve threaded into said high pressurecylinder in axial alinement with said iirst mentioned sleeve, a pistonincluding a head disposedy in said high pressure cylinder and a hingepin engaging stem slidable in said threaded sleeve, said thread,- edsleeve being provided in its outer end with a hinge engaging collar andthe opening in said sleeve being beveled at the collar end thereof, anda coil spring sleeved on the stem of said piston between the headthereof and the inner end of said threaded sleeve, said other jaw havinga lateral extension disposed at an angle of substantially ninety degreesto said hand grip portion and provided with a primary cylindercommunieating at its inner end with said high pressure cylinder.

JOSEPH G. MEINERS.

